The production supervisor of the Machining Department for Celtic Company agreed to the following monthly static budget for the upcoming year: The actual amount spent and the actual units produced in the first three months in the Machining Department were as follows: The Machining Department supervisor has been very pleased with this performance because actual expenditures for January-March have been less than the monthly static budget of $422,000. However, the plant manager believes that the budget should not remain fixed for every month but should "flex" or adjust to the volume of work that is produced in the Machining Department. Additional budget information for the Machining Department is as follows: a. Prepare a flexible budget for the actual units produced for January, February, and March in the Machining Department. Assume that depreciation is a fixed cost. If required, use per unit amounts carried out to two decimal places. Consider performance and spending. b. Compare the flexible budget with the actual expenditures for the first three months